71970959 has 4 divisors (see below), whose sum is σ = 73502304. Its totient is φ = 70439616.

The previous prime is 71970947. The next prime is 71970967. The reversal of 71970959 is 95907917.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95907917 = 7 ⋅13701131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71970959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 1531297 = 71970959 / (7 + 1 + 9 + 7 + 0 + 9 + 5 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71970989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765602 + ... + 765695.

It is an arithmetic number, because the mean of its divisors is an integer number (18375576).

Almost surely, 2^71970959 is an apocalyptic number.

71970959 is a deficient number, since it is larger than the sum of its proper divisors (1531345).

71970959 is a wasteful number, since it uses less digits than its factorization.

71970959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531344.

The product of its (nonzero) digits is 178605, while the sum is 47.

The square root of 71970959 is about 8483.5699443100. The cubic root of 71970959 is about 415.9608240197.

The spelling of 71970959 in words is "seventy-one million, nine hundred seventy thousand, nine hundred fifty-nine".